素纽结
素纽结（Prime knot）是指不能分解的非平凡纽结。更详细的定义，素纽结不能表示为两个非平凡纽结的连通和。不是素纽结的纽结称为「复合纽结」。
环面扭结是素纽结的一种表范家族。。纽结理论中，环面纽结是一种特殊的纽结。它是由一对整参数p和q决定。
Prime knot
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Prime knot 素纽结
In knot theory, a prime knot or prime link is a knot that is, in a certain sense, indecomposable. Specifically, it is a non-trivial knot which cannot be written as the knot sum of two non-trivial knots. Knots that are not prime are said to be composite knots or composite links. It can be a nontrivial problem to determine whether a given knot is prime or not.
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